./configure complaining about zlib dependency

php.install, I'm trying to compile php 5.3.2 and I get an error about not having the right zlib version. I have zlib and zlib-devel installed at version 1.2.3 . I get the error: checking for ZLIB support... yes checking if the location of ZLIB install directory is defined... no checking for gzgets in -lz... no configure: error: ZLIB extension requires zlib >= 1.0.9 The tail of the configure.log is: configure:23803: checking for ZLIB support configure:23850: checking if the location of ZLIB install directory is defined configure:24296: checking for gzgets in -lz configure:24315: gcc -o conftest -g -O2 -fvisibility=hidden -L/usr/local/lib -L/usr/kerberos/lib64 conftest.c -lz -lpcre -lrt -lm -ldl -lnsl -lxml2 -lz -lm -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lssl -lcrypto -ldl -lz 1>&5 /usr/bin/ld: skipping incompatible /usr/lib/libcom_err.so when searching for -lcom_err /usr/bin/ld: skipping incompatible /usr/lib/libcom_err.a when searching for -lcom_err /usr/bin/ld: cannot find -lcom_err collect2: ld returned 1 exit status configure: failed program was: #line 24304 "configure" #include "confdefs.h" /* Override any gcc2 internal prototype to avoid an error. */ /* We use char because int might match the return type of a gcc2

    builtin and then its argument prototype would still apply.  */

char gzgets(); int main() { gzgets() ; return 0; } My configure command from phpinfo is: ./configure --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu --target=x86_64-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com --mandir=/usr/share/man --infodir=/usr/share/info --cache-file=../config.cache --with-libdir=lib64 --with-config-file-path=/etc --with-config-file-scan-dir=/etc/php.d --disable-debug --with-pic --disable-rpath --without-pear --with-bz2 --with-curl --with-exec-dir=/usr/bin --with-freetype-dir=/usr --with-png-dir=/usr --enable-gd-native-ttf --without-gdbm --with-gettext --with-gmp --with-iconv --with-jpeg-dir=/usr --with-openssl --with-png --with-pspell --with-expat-dir=/usr --with-pcre-regex=/usr --with-zlib --with-layout=GNU --enable-exif --enable-ftp --enable-magic-quotes --enable-sockets --enable-sysvsem --enable-sysvshm --enable-sysvmsg --enable-track-vars --enable-trans-sid --enable-yp --enable-wddx --with-kerberos --enable-ucd-snmp-hack --with-unixODBC=shared,/usr --enable-memory-limit --enable-shmop --enable-calendar --enable-dbx --enable-dio --with-mime-magic=/usr/share/file/magic.mime --without-sqlite --with-libxml-dir=/usr --with-xml --with-system-tzdata --with-apxs2=/usr/sbin/apxs --without-mysql --without-gd --without-odbc --disable-dom --disable-dba --without-unixODBC --disable-pdo --disable-xmlreader --disable-xmlwriter I get the feeling this is the same issue as http://bugs.php.net/bug.php?id=27357 but I don't understand the solution:

The missing iconv library comes from libxml2 setup. Try this: # xml2-config --libs

Also, I had to compile xml2-config just before configuring php and the configure script seemed to find xml2-config fine. Rich